External rotor motor and fan

Abstract

The present invention belongs to the field of motor technology, and more specifically, it relates to an outer rotor motor and a fan. Among them, the outer rotor motor includes a mounting seat, a power cord, and a terminal block and an end cover assembly installed on the mounting seat. The end cover assembly includes a cover plate and a wire pressing plate. The cover plate is provided with a wire outlet groove. One end of the power cord is connected to the terminal block, and the other end of the power cord passes through the wire outlet groove. The wire pressing plate cooperates with the cover plate to clamp the power cord in the wire outlet groove. In this way, the cover plate is provided with a wire outlet groove to lead out the power cord, and then the power cord is clamped in the wire outlet groove by providing a wire pressing plate and cooperating with the cover plate. The power cord will not be shaken by external forces, and the connection between the power cord and the terminal block can be prevented from being loosened and poor contact can be avoided. The power cord will not be repeatedly bent and broken due to displacement, and damage to the power cord can also be avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and more specifically, relates to an outer rotor motor and a fan. Background Art

[0002] With the energy efficiency upgrade of the electrical industry, external rotor motors are widely used in exhaust equipment, air-conditioning units, air purification systems, cooling equipment and other fields due to their compact structure and high material utilization.

[0003] The structure of the outer rotor motor is different from that of the traditional motor. The stator assembly of the outer rotor motor is in the middle of the motor, and the rotor assembly is on the outside. The external lead wires of the motor are connected to the terminal board inside the motor to supply power to the winding coils of the stator assembly, etc. The connection stability between the power cord and the terminal board directly affects the stability of the motor. In the related art, when wiring, the power cord is led out from the inside of the motor, and the end of the power cord located outside the motor may shake due to various factors, thereby loosening the connection position between the power cord and the terminal board, resulting in poor contact between the power cord and the terminal board, unstable power supply to the motor, and abnormal operation of the motor. Summary of the invention

[0004] The main purpose of the embodiments of the present invention is to provide an outer rotor motor and a fan to solve the technical problem in the prior art that the end of the power cord of the outer rotor motor located outside the motor may shake due to various factors, thereby causing the connection position between the power cord and the terminal board to loosen, resulting in poor contact between the power cord and the terminal board, and causing unstable power supply to the motor.

[0005] The technical solution adopted by the present invention is: to provide an outer rotor motor, including a mounting base, a power cord, and a terminal block and an end cover assembly installed on the mounting base, the end cover assembly includes a cover plate and a wire pressing plate, the cover plate is provided with a wire outlet groove, one end of the power cord is connected to the terminal block, and the other end of the power cord passes through the wire outlet groove, and the wire pressing plate cooperates with the cover plate to clamp the power cord.

[0006] In some embodiments, the mounting seat includes a mounting ear and a mounting cylinder protruding from one side of the mounting ear, the cover plate and the wire pressing plate are respectively connected to the mounting ear, and along the radial direction of the mounting ear, the wire outlet groove is located on the side of the mounting ear and / or the mounting cylinder.

[0007] In some embodiments, the cover plate includes a cover plate portion and a side plate portion connected to the cover plate portion, the cover plate portion is axially covered on the mounting ear portion along the mounting cylinder portion, the side plate portion is radially arranged on the side of the mounting ear portion along the mounting cylinder portion, and the wire outlet groove is arranged on the side plate portion.

[0008] In some embodiments, the cover portion is provided with an embedding opening, the embedding opening passes through the wire outlet slot, the wire pressing plate has a shielding portion and a pressing portion, the shielding portion covers the embedding opening, and the pressing portion cooperates with the wire outlet slot to clamp the power cord.

[0009] In some embodiments, a protrusion is provided at a position of the pressing portion corresponding to the wire outlet slot, and the protrusion extends into the wire outlet slot and presses against the power line.

[0010] In some embodiments, the side plate portion is provided with a plurality of wire outlet grooves along the circumferential direction, and the pressing portion is provided with a protrusion at a position corresponding to each wire outlet groove.

[0011] In some embodiments, the side panel is further provided with an insertion port, and the wire pressing plate further has an insertion portion, and the wire pressing plate is plugged into the cover plate through the insertion portion and the insertion port.

[0012] In some embodiments, the mounting ear portion includes a first connecting ear, a second connecting ear, and a third connecting ear arranged along the circumference of the mounting cylinder portion, the wire pressing plate is connected to the first connecting ear, the cover portion is connected to the third connecting ear, and the second connecting ear is exposed from the cover portion and is used for connection to an external structure.

[0013] In some embodiments, along the axial direction of the mounting tube, the first connecting ear and the third connecting ear are both concave relative to the second connecting ear, and the thickness of the wire pressing plate and the thickness of the cover plate are both equal to the depth of the concave.

[0014] In some embodiments, there is a gap between the side panel and the side of the mounting ear, the wire outlet slot is connected to the gap, the terminal block is arranged on the side of the mounting ear away from the cover plate, and the power cord is led out at a position of the terminal block facing the gap.

[0015] In some embodiments, the outer rotor motor also includes a stator core, a boss is provided around the outer peripheral wall of the end portion where the mounting cylinder is connected to the mounting ear portion, a terminal block is sleeved on the boss, the stator core is sleeved on the end of the mounting cylinder portion where the boss is not provided, and the end face of the stator core facing the mounting ear portion abuts against the boss and is spaced apart from the terminal block.

[0016] In some embodiments, the stator core is bonded to the mounting cylinder by adhesive, and the mounting cylinder is provided with a groove for accommodating excess adhesive.

[0017] In some embodiments, the wiring board is provided with a second sleeve hole for the boss to pass through, and a clamping positioning structure is provided between the hole wall of the second sleeve hole and the outer peripheral wall of the boss.

[0018] The above one or more technical solutions in the outer rotor motor provided by the embodiment of the present invention have at least one of the following technical effects: a wire outlet groove is set on the cover plate of the end cover assembly, and the power line is led out from the wire outlet groove after being drawn out from the wiring board, and then a wire pressing plate is set to cooperate with the cover plate to clamp the power line in the wire outlet groove. After the end cover assembly is connected to the mounting seat, the power line is restricted from moving. In this way, during the operation of the motor, the power line will not be shaken by external forces, thereby avoiding the loose connection between the power line and the wiring board and avoiding poor contact. In addition, the power line will not be repeatedly bent due to displacement, or broken due to repeated friction with the wiring board or cover plate, thereby effectively avoiding damage to the power line and further improving the overall performance of the outer rotor motor. In addition, the end cover assembly is made separately from the mounting seat, and the end cover assembly can be made of a material with a higher cost-effectiveness than the mounting seat, thereby reducing the structural complexity of the mounting seat and the manufacturing cost of the entire motor.

[0019] Another technical solution of the present invention is to provide a fan, comprising the above-mentioned outer rotor motor.

[0020] The above one or more technical solutions in the fan provided by the embodiment of the present invention have at least one of the following technical effects: by using the above-mentioned outer rotor motor, the production cost of the fan is reduced, and the electrical performance of the fan is more stable and reliable, the probability of electrical failure of the fan due to poor electrical contact of the outer rotor motor is reduced, the overall performance of the fan is improved, the maintenance frequency is reduced, and the user experience is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A cross-sectional structural diagram of an outer rotor motor provided in one embodiment of the present invention;

[0023] Figure 2 Figure 1 An exploded schematic diagram of an outer rotor motor is shown;

[0024] Figure 3 for Figure 1 A schematic structural diagram of an end cover assembly of an outer rotor motor shown;

[0025] Figure 4 for Figure 3 An exploded schematic diagram of the end cap assembly shown;

[0026] Figure 5 for Figure 1 A schematic structural diagram of a mounting base of an outer rotor motor shown;

[0027] Figure 6 for Figure 5 Another perspective view of the mount shown;

[0028] Figure 7 for Figure 1 A schematic structural diagram of a stator assembly of an outer rotor motor shown;

[0029] Figure 8 for Figure 7 An exploded schematic diagram of the stator assembly is shown;

[0030] Fig. 9 for Figure 1 A schematic structural diagram of a rotor assembly of an outer rotor motor shown;

[0031] Fig.10 for Figure 1 The schematic diagram of the structure of the terminal board of the outer rotor motor is shown.

[0032] In the figure, each figure is mainly marked as:

[0033] 10. stator assembly; 11. stator core; 111. first sleeve hole; 1111. first flat position; 1112. positioning groove; 12. insulation frame; 121. upper frame; 122. lower frame; 13. coil winding;

[0034] 20. Mounting seat; 21. Mounting ear; 211. First connecting ear; 212. Second connecting ear; 213. Third connecting ear; 214. Screw hole; 215. Fourth connecting hole; 22. Mounting cylinder; 221. First bearing chamber; 222. Second bearing chamber; 223. Through hole; 224. Boss; 2242. Groove; 2243. Block; 225. Second flat position; 226. Positioning convex block; 23. Gap;

[0035] 30. Wiring board; 31. Second socket hole; 32. Bayonet; 33. Third connection hole; 34. Open slot; 341. First slot section; 342. Second slot section; 35. Single-sided pad; 36. Double-sided pad;

[0036] 40. Power cord;

[0037] 50. End cover assembly; 51. Cover plate; 511. Cover plate portion; 5111. Opening; 5112. Second connection hole; 5113. Avoidance opening; 5114. Stopper portion; 512. Side plate portion; 5121. Insertion port; 5122. Mounting hole; 52. Pressing plate; 521. Shielding portion; 5211. First connection hole; 522. Pressing portion; 5221. Protrusion; 523. Insertion portion; 53. Wire outlet slot;

[0038] 60, rotating shaft; 601, supporting end; 602, output end; 61, bearing;

[0039] 70. rotor assembly; 71. rotor; 711. shaft hole; 72. magnetic steel;

[0040] 100. Fasteners. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following is a detailed description of the technical problems, technical solutions and beneficial effects to be solved by the present invention in conjunction with Figures 1 to 3. Fig.10 It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0043] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] References to "one embodiment", "some embodiments" or "an embodiment" described in the present specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present invention. The phrases "in one embodiment", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. In addition, in one or more embodiments, specific features, structures or characteristics may be combined in any suitable manner.

[0046] like Figures 1 to 10 As shown, the present invention provides an outer rotor motor, as shown below in combination with the attached Figures 1 to 10 The outer rotor motor of the present invention is described in detail with reference to specific embodiments.

[0047] See also Figures 1 to 4 ,in, Figure 1 is a cross-sectional structural diagram of an outer rotor motor according to an embodiment of the present invention, Figure 2 Figure 1 The exploded schematic diagram of the external rotor motor shown in FIG. Figure 3 for Figure 1 The schematic diagram of the structure of the end cover assembly of the outer rotor motor shown in FIG. Figure 4 for Figure 3 An exploded schematic diagram of the end cap assembly is shown.

[0048] In this embodiment, if Figure 1 and Figure 2 As shown, the outer rotor motor includes a mounting base 20 and an end cover assembly 50, wherein a terminal block 30 is mounted on the mounting base 20, a power line 40 is connected to the terminal block 30, and the end cover assembly 50 is mounted on the mounting base 20, and the end cover assembly 50 includes a cover plate 51 and a wire pressing plate 52, and the cover plate 51 is provided with a wire outlet groove 53, as shown in FIG. Figure 3 and Figure 4 As shown, one end of the power cord 40 is connected to the wiring board 30, and the other end of the power cord 40 passes through the outlet groove 53. The wire pressing plate 52 cooperates with the cover plate 51 to clamp the power cord 40 in the outlet groove 53. Figure 1 As shown, specifically, the wire pressing plate 52 cooperates with the groove wall of the wire outlet groove 53 to clamp the power line 40, ensuring that the power line 40 will not move randomly due to external force.

[0049] The outer rotor motor provided by the embodiment of the present invention is provided with a wire outlet groove 53 on the cover plate 51 of the end cover assembly 50, and the power line 40 is led out from the wire outlet groove 53 after being drawn out from the terminal block 30, and then a wire pressing plate 52 is provided to cooperate with the cover plate 51 to clamp the power line 40 in the wire outlet groove 53, and after the end cover assembly 50 is connected to the mounting seat 20, the power line 40 is restricted from moving. In this way, during the operation of the motor, the power line 40 will not be shaken by external forces, thereby preventing the connection between the power line 40 and the terminal block 30 from loosening and preventing poor contact. In addition, the power line 40 will not be repeatedly bent due to displacement, or broken due to repeated friction with the terminal block 30 or the cover plate 51, thereby effectively preventing the power line 40 from being damaged, and further improving the overall performance of the outer rotor motor. In addition, the end cover assembly 50 is made separately from the mounting seat 20, and the end cover assembly 50 can be made of a material with a higher cost performance than the mounting seat 20, thereby reducing the structural complexity of the mounting seat 20 and the manufacturing cost of the entire motor.

[0050] In the related technology, for external rotor motors, the development trend of motor miniaturization takes into account that how to lay out the power cord may affect the overall volume of the motor. Therefore, when considering leading the power cord out from the inside of the motor, it is necessary to consider not only the connection stability between the power cord and the terminal board, but also the miniaturization development needs of the motor.

[0051] Based on this, another embodiment of the present invention provides an outer rotor motor which comprehensively considers the compactness of the overall structure of the motor while improving the connection stability of the power line.

[0052] In this embodiment, if Figure 1 , Figure 3 and Figure 5 As shown, the mounting seat 20 includes a mounting ear 21 and a mounting barrel 22, wherein the mounting barrel 22 protrudes from one side of the mounting ear 21 and extends away from the mounting ear 21, and the mounting ear 21 provides a centralized mounting and connecting area for the end cover assembly 50 and some external structures of the motor such as external interfaces, and the mounting barrel 22 is used for sleeve installation of the stator assembly 10 and the rotor assembly 70. The cover plate 52 and the wire pressing plate 52 are both connected to the mounting ear 21, and along the radial direction of the mounting ear 21, the wire outlet groove 53 is located on the side of the mounting ear 21 and / or the mounting barrel 22, that is, the wire outlet groove is located on the side of the outer rotor motor of this embodiment. In this way, the power cord 40 is led out from the side of the motor, which will not increase the axial size of the outer rotor motor of this embodiment, and will help to reduce the axial height of the outer rotor motor, making the structure of the motor more compact, thereby reducing the overall volume of the motor.

[0053] Specifically, in this embodiment, the cover plate 51 includes a cover plate portion 511 and a side plate portion 512 connected to the cover plate portion 511, the cover plate portion 511 is arranged on the mounting ear portion 21 along the axial direction of the mounting cylinder portion 22, the side plate portion 512 is arranged on the side of the mounting ear portion 21 along the radial direction of the mounting cylinder portion 22, the terminal block 30 is arranged on the side of the mounting ear portion 21 away from the cover plate portion 511, and the wire outlet groove 53 is arranged on the side plate portion 512.

[0054] In this embodiment, if Figure 1 As shown, the side plate portion 512 is spaced apart from the side of the mounting ear portion 21 to form a gap 23, the wire outlet slot 53 is connected to the gap 23, the terminal block 30 is arranged on the side of the mounting ear portion 21 away from the cover plate portion 511, and the power line 40 is led out from the terminal block 30 at a position where the terminal block 30 is directly opposite to the gap 23. The gap 23 is reserved inside the motor for the power line 40 to be routed, and the leading out of the power line 40 will not interfere with the layout of other structures.

[0055] In some specific embodiments, Figure 3 and Figure 4 As shown, the cover plate portion 511 is provided with an embedding opening 5111, the embedding opening 5111 is connected to the wire outlet groove 53, the wire pressing plate 52 has a shielding portion 521 and a pressing portion 522, the shielding portion 521 is adapted to cover the embedding opening 5111, and the pressing portion 522 cooperates with the wire outlet groove 53 to clamp the power cord 40. In this way, the wire outlet groove 53 is arranged on the side of the mounting seat 20, and when the power cord 40 is led out, the power cord 40 is first led out from the embedding opening 5111, and then inserted into the wire outlet groove 53, and then the wire pressing plate 52 is connected to the mounting ear portion 21 and the pressing portion 522 presses the power cord 40 into the wire outlet groove 53.

[0056] In this embodiment, in order to ensure that the power cord 40 is clamped in the wire outlet groove 53, the size of the groove of the wire outlet groove 53 can be set to be basically equal to the radial cross-sectional size of the power cord 40, that is, the wire outlet groove 53 can just allow the power cord 40 to be embedded. In this way, when the power cord 40 is clamped in the wire outlet groove 53, the power cord 40 directly abuts against the pressing portion 522, and the power cord 40 can be clamped in the wire outlet groove 53.

[0057] Alternatively, if Figure 3 and Figure 4As shown, the slot size of the outlet groove 53 can also be set to be larger than the cross-sectional size of the power cord 40 in the radial direction, and a protrusion 5221 is set at the position where the pressing portion 522 is directly opposite to the outlet groove 53. When the pressing plate 52 is connected to the mounting ear portion 21, the protrusion 5221 extends into the corresponding outlet groove 53 and abuts against the power cord 40. That is, the protrusion 5221 abuts against the power cord 40, thereby clamping the power cord 40 in the outlet groove 53. In this way, the movement of the power cord 40 is restricted by the pressing of the protrusion 5221, and the size of the outlet groove 53 can be relatively set larger, so that power cords 40 of different sizes can be inserted, and the application range is wider and the use is more flexible.

[0058] In this embodiment, if Figure 3 and Figure 4 As shown, the side plate portion 512 of the cover plate 51 can be continuously provided with a plurality of outlet grooves 53. When a plurality of power lines 40 need to be led out, the plurality of power lines 40 pass through different outlet grooves 53, which is convenient for management and inspection and maintenance. Moreover, in the above-mentioned scheme of providing the protrusion 5221 to press the power line 40, the protrusion 5221 is respectively provided for each outlet groove 53, that is, a plurality of protrusions 5221 are continuously provided on the pressing portion 522 of the wire pressing plate 52. When the wire pressing plate 52 is connected to the mounting ear portion 21, each protrusion 5221 extends into each outlet groove 53 accordingly, so that each power line 40 is pressed and clamped in the corresponding outlet groove 53 accordingly.

[0059] It can be understood that, in a specific embodiment, the number of the outlet slots 53 can be set according to specific needs such as the number of power lines 40, and the number of the outlet slots 53 is not uniquely limited here.

[0060] In some specific embodiments, Figure 4 As shown, the embedding opening 5111 may be located only at the cover plate portion 51. In this case, the wire outlet groove 53 is a notch provided at the end where the side plate portion 52 and the cover plate portion 51 are connected, thereby penetrating the embedding opening 5111. In other specific embodiments, the embedding opening 5111 may also extend from the cover plate portion 51 to the side plate portion 52. In this case, the wire outlet groove 53 may be provided at any position of the side plate portion 52 and may penetrate the embedding opening 5111.

[0061] In another embodiment of the present invention, Figure 3 and Figure 4 As shown, the cover plate 51 is also provided with an insertion port 5121, and the wire pressing plate 52 is also provided with a plug-in portion 523, and the wire pressing plate 52 is plugged into the cover plate 51 through the plug-in portion 523 and the plug-in port 5121. In this way, the wire pressing plate 52 is plugged and matched with the cover plate 51, which facilitates the positioning and installation of the wire pressing plate 52 and the mounting ear portion 21, and can also assist in limiting the wire pressing plate 52.

[0062] Specifically, in this embodiment, Figure 4As shown, the plug-in port 5121 is arranged on the side plate portion 512 of the cover plate 51, and one plug-in port 5121 is arranged on each side of the outlet groove 53, the cover plate portion 511 is provided with a stopper portion 5114 extending into the opening 5111 and located above the plug-in port 5121, the plug-in portion 523 is arranged at intervals at the bottom of the shielding portion 521 facing the outlet groove 53, and one plug-in portion 523 is arranged on each side of the shielding portion 521 corresponding to the two plug-in ports 5121. The two plug-in portions 523 are respectively inserted into the corresponding plug-in ports 5121, and the two stoppers 5114 are respectively in contact with the plug-in portions 523 located below to limit the axial movement of the wire pressing plate 52 along the mounting barrel portion 22, to prevent the wire pressing plate 52 from shaking, and to affect the connection stability of the wire pressing plate 52 with the mounting ear portion 21.

[0063] In another embodiment of the present invention, Figure 1 , Figure 2 and Figure 5 As shown, Figure 5 for Figure 1 The schematic diagram of the structure of the mounting seat of the outer rotor motor shown in FIG. In this embodiment, the mounting ear portion 21 includes a first connecting ear 211, a second connecting ear 212 and a third connecting ear 213 arranged along the circumference of the mounting cylinder portion 22, the wire pressing plate 52 is connected to the first connecting ear 211, the cover plate portion 511 is connected to the third connecting ear 213, and the second connecting ear 212 is exposed from the cover plate portion 511 and is used for connection with an external structure other than the outer rotor motor of this embodiment.

[0064] Among them, Figure 1 , Figure 2 and Figure 5 As shown, along the axial direction of the mounting barrel 22, the outer end surface of the first connecting ear 211 is concave relative to the outer end surface of the second connecting ear 212, that is, the first connecting ear 211 is concave relative to the second connecting ear 212. In this way, when the wire pressing plate 52 is installed on the mounting ear 21, the outer end surface of the wire pressing plate 52 is concave relative to the outer end surface of the second connecting ear 212, or the outer end surface of the wire pressing plate 52 is flush with the outer end surface of the second connecting ear 212, so as to ensure that the axial size of the motor will not be enlarged due to the setting of the wire pressing plate 52, and meet the needs of the miniaturization development of the motor.

[0065] Optionally, in some other embodiments, along the axial direction of the mounting barrel 22, the outer end surface of the third connecting ear 213 is also concave relative to the outer end surface of the second connecting ear 212, that is, the third connecting ear 213 is also concave relative to the second connecting ear 212. In this way, when the entire end cover assembly 50 is installed on the mounting ear portion 21, the outer end surface of the entire end cover assembly 50 is flush with the outer end surface of the second connecting ear 212, so that the arrangement of the end cover assembly 50 is ensured without causing the axial size of the motor to become larger, meeting the needs of the miniaturization development of the motor.

[0066] It should be noted that, in this embodiment, the outer end surfaces of the first connecting ear 211 , the second connecting ear 212 and the third connecting ear 213 refer to the end surfaces of the three connecting ears facing away from the mounting cylinder 22 along the axial direction of the mounting cylinder 22 .

[0067] In this way, when the cover plate 51 and the wire pressing plate 52 are installed on the mounting ear 21, the outer end surface of the wire pressing plate 52 and the outer end surface of the cover plate portion 511 are concave relative to the outer end surface of the second connecting ear 212, or the outer end surface of the wire pressing plate 52 and the outer end surface of the cover plate portion 511 are flush with the outer end surface of the second connecting ear 212. In this way, it is ensured that the axial dimension of the motor will not be enlarged due to the setting of the end cover assembly 50, thereby meeting the needs of miniaturization of the motor.

[0068] In this embodiment, along the axial direction of the mounting cylinder 22, the recessed depth of the first connecting ear 211 relative to the second connecting ear 212 is equal to the thickness of the cover portion 511, and the recessed depth of the third connecting ear 213 relative to the second connecting ear 212 is equal to the thickness of the wire pressing plate 52, that is, the thickness of the wire pressing plate 52 is substantially equivalent to the thickness of the cover portion 511, so that the outer end surfaces of the cover portion 511, the wire pressing plate 52 and the second connecting ear 212 are located in the same plane, with higher overall consistency and a more continuous and beautiful structure.

[0069] In addition, a clearance opening 5113 is provided at a position of the cover portion 511 corresponding to the second connecting ear 212. The clearance opening 5113 avoids the second connecting ear 212 to expose the second connecting ear 212. The wall surface of the clearance opening 5113 abuts against the side wall of the second connecting ear 212 to prevent dust from entering due to gaps.

[0070] Specifically, in this embodiment, the mounting ear portion 21 has a plurality of second connecting ears 212, a first connecting ear 211, and two third connecting ears 213, wherein the plurality of second connecting ears 212 are evenly spaced along the circumference of the mounting ear portion 21, the first connecting ear 211 is arranged between two adjacent second connecting ears 212, and the two third connecting ears 213 are arranged between two adjacent second connecting ears 212, the first connecting ear 211 and the third connecting ears 213 are not adjacent to each other, and the first connecting ear 211 and the two third connecting ears 213 are rotationally symmetrical relative to the axis of the mounting cylinder portion 22, so that the entire mounting ear portion 21 has a rotationally symmetrical structure, the mass is evenly distributed, and the structural stability is higher.

[0071] Furthermore, if Figure 1 , Figure 2 and Figure 5As shown, in this embodiment, the wire pressing plate 52 is provided with a first connection hole 5211, and the first connection ear 211 is provided with a screw hole 214 at a position corresponding to the first connection hole 5211. The wire pressing plate 52 is screwed to the screw hole 214 of the first connection ear 211 after a fastener 100 such as a screw or a bolt passes through the first connection hole 5211. Similarly, the cover plate portion 511 is provided with a second connection hole 5112, and the third connection ear 213 is provided with a screw hole 214 at a position corresponding to the third connection hole 33. The cover plate portion 511 is screwed to the screw hole 214 of the third connection ear 213 after a fastener 100 such as a screw or a bolt passes through the second connection hole 5112. The wiring board 30 is provided with a third connection hole 33, and the second connection ear 212 is provided with a screw hole 214 at a position corresponding to the fourth connection hole 215. The wiring board 30 is screwed to the screw hole 214 of the second connection ear 212 after a fastener 100 such as a rivet or a screw passes through the fourth connection hole 215. In addition, the second connection ear 5112 is also provided with a fourth connection hole 215, and the third connection hole 33 is used to connect to an external structure. That is, the cover plate portion 511, the wire pressing plate 52 and the wiring board 30 are all fastened and connected to the mounting ear portion 21 through the fastener 100, and the disassembly and assembly operation is simple and the connection reliability is high.

[0072] In another embodiment of the present invention, please refer to Figure 1 , Figure 2 ,as well as Figures 6 to 9 ,in, Figure 6 for Figure 5 Another view of the mount shown, Figure 7 for Figure 1 The schematic diagram of the structure of the stator assembly of the outer rotor motor shown in FIG. Figure 8 for Figure 7 An exploded schematic diagram of the stator assembly is shown. Fig. 9 for Figure 1 The schematic diagram of the structure of the rotor assembly of the outer rotor motor is shown.

[0073] In this embodiment, the outer rotor motor further includes a stator assembly 10 , a rotating shaft 60 and a rotor assembly 70 .

[0074] Among them, Figure 7 and Figure 8As shown, the stator assembly 10 includes a stator core 11, an insulating frame 12 and a coil winding 13. The stator core 11 and the coil winding 13 cooperate to form an electromagnetic effect. The insulating frame 12 is used to insulate the stator core 11 and the winding to form an electrical safety gap 23. In some specific embodiments, the insulating frame 12 of the stator assembly 10 can be plastic-coated with the stator core 11 as a whole (not shown). In this way, on the one hand, the insulating frame 12 and the stator core 11 have better connectivity, eliminating the gap required for assembly, thereby further improving the slot fill rate of the slot line. On the other hand, the step of assembling the frame to the core can be reduced during assembly, which has the effect of reducing labor or equipment costs. Or, in some other embodiments, such as Figure 8 As shown, the insulating frame 12 may also include an upper frame 121 and a lower frame 122. The upper frame 121 and the lower frame 122 are respectively arranged at the two ends of the stator core 11 along the axial direction. The upper frame 121 and the lower frame 122 are injection molded separately. The injection molding process is simple and the manufacturing cost is low. The upper frame 121 and the lower frame 122 may also be provided with different characteristic structures to realize their respective functional roles.

[0075] In some specific embodiments, Figure 1 , Figure 2 and Figure 5 As shown, the end of the mounting barrel 22 away from the mounting ear 21 is provided with a first bearing chamber 221, and the mounting ear 21 is provided with a second bearing chamber 222 that penetrates the first bearing chamber 221 and is concentric with the first bearing chamber 221. Specifically, the mounting barrel 22 is also provided with a guide hole 223, and the first bearing chamber 221 penetrates the second shaft hole 711 through the guide hole 223. A bearing 61 is respectively installed in the first bearing chamber 221 and the second bearing chamber 222, and the rotating shaft 60 is sleeved with the two bearings 61. That is, the mounting seat 20 is hollow inside and is provided with two bearing chambers disposed at both ends of the axial direction. The bearing chambers disposed at both ends of the axial direction increase the span of the two supporting bearings 61 along the axial direction, and the rotating shaft 60 is supported on the inner side of the mounting seat 20, thereby increasing the stability of the motor support and rotation.

[0076] In some specific embodiments, Figure 1 , Figure 2 and Figure 5 As shown, a boss 224 is radially protruded on the outer peripheral wall of the mounting barrel 22, and the boss 224 is arranged at the end of the mounting barrel 22 connected to the mounting ear 21. The terminal block 30 is sleeved on the boss 224. The stator core 11 is sleeved on the end of the mounting barrel 22 away from the boss 224. The end surface of the stator core 11 facing the mounting ear 21 is spaced from the terminal block 30 and abuts against the step surface 2241 of the boss 224. The boss 224 is used to axially limit the stator core 11 and the terminal block 30, ensuring that there is a certain distance between the stator core 11 and the terminal block 30, and providing installation space for the coil winding 13.

[0077] Furthermore, in this embodiment, if Figure 1 and Figure 6 As shown, the stator core 11 is loosely matched with the mounting barrel 22, and is bonded to the mounting barrel 22 by adhesives such as glue, etc. The outer peripheral wall of the mounting barrel 22 where the stator core 11 is sleeved is radially recessed to form a groove 2242, and the groove 2242 is used to accommodate excess adhesive. In this way, the stator core 11 can be loosely matched with the mounting barrel 22, so that the mounting barrel 22 and its internal structure will not be deformed due to extrusion when the stator core 11 is assembled; and by bonding the stator core 11 and the mounting barrel 22, the connection reliability between the two is improved, and the vibration and noise caused by the shaking of the stator core 11 due to the existence of the gap are avoided; and by setting the groove 2242, when the stator core 11 is bonded to the mounting barrel 22 by glue, etc., the excess glue can flow to be stored in the groove 2242, and will not flow to other positions to cause pollution or affect the installation and operation of other structures.

[0078] In this embodiment, the groove 2242 may be an annular groove arranged around the mounting cylinder 22 to provide as large a storage space as possible for the adhesive.

[0079] It can be understood that in other embodiments, the above-mentioned groove 2242 can also be set on the step surface of the boss 224 facing the stator core 11, that is, the step surface is recessed along the axial direction of the mounting cylinder 22 toward the mounting ear 21. At this time, the groove 2242 can also play a role in storing adhesive.

[0080] In some specific embodiments, Figure 2 , Figure 6 and Figure 8 As shown, the stator core 11 is provided with a first sleeve hole 111 for the installation barrel 22 to pass through, the hole wall of the first sleeve hole 111 is provided with a first flat position 1111, and the outer wall of the installation barrel 22 is provided with a second flat position 225 adapted to the first flat position 1111, wherein the first flat position 1111 and the second flat position 225 are adapted to each other, which means that the two have the same shape, the same size, and are located opposite to each other. The flat position feature is provided at the position where the stator core 11 contacts the installation barrel 22, which, on the one hand, enables the installation barrel 22 to have a certain torque transmission ability, and on the other hand, the first flat position 1111 and the second flat position 225 can also be used for positioning, thereby improving the assembly efficiency of the stator core 11 and the installation seat 20.

[0081] Furthermore, in some embodiments, Figure 2 and Figure 8As shown, the outer wall of the mounting cylinder 22 is also radially provided with a positioning protrusion 226, and the hole wall of the first sleeve hole 111 is provided with a positioning groove 1112 for the positioning protrusion to fit in and snap in at the position corresponding to the positioning protrusion 226. When the stator core 11 is sleeved on the mounting cylinder 22, the positioning protrusion 226 is snapped into the positioning groove 1112, and the two cooperate with each other for positioning during assembly, and can also further improve the torque transmission capacity of the mounting cylinder 22.

[0082] In some specific embodiments, Figure 2 , Figure 6 and Figure 8 As shown, the wiring board 30 is provided with a second sleeve hole 31 for the boss 224 to pass through, and a clamping positioning structure is provided between the hole wall of the second sleeve hole 31 and the outer peripheral wall of the boss 224. Specifically, a clamping block 2243 is provided on the outer peripheral wall of the boss 224 along the radial direction of the installation cylinder 22, and the second sleeve hole 31 is provided with a bayonet 32 ​​for the clamping block 2243 to be adapted and clamped. The clamping block 2243 and the bayonet 32 ​​form a clamping positioning structure for positioning the wiring board 30 when the wiring board 30 is installed. It can be understood that the positions of the clamping block 2243 and the bayonet 32 ​​can also be interchanged, that is, the bayonet 32 ​​is set on the outer peripheral wall of the boss 224, and the clamping block 2243 is correspondingly set on the hole wall of the second sleeve hole 31.

[0083] In some specific embodiments, Figure 1 , Figure 2 and Fig.10 As shown, the above-mentioned rotor assembly 70 includes a rotor 71 and a magnetic steel 72. The rotor 71 is rotatably sleeved on one end of the mounting cylinder 22 away from the mounting ear 21, and is sleeved on the outer side of the stator assembly 10 along the radial direction of the mounting cylinder 22, so that the rotor assembly 70 can be sleeved from the small-sized end of the mounting seat 20 to the outer side of the stator assembly 10, which has good assembly operability; the rotating shaft 60 is coaxially fixedly connected to the rotor assembly 70, specifically, the rotor 71 is provided with an axial hole 711, and the rotating shaft 60 is passed through and fixed to the axial hole 711, and the rotating shaft 60 has a supporting end 601 and an output end 602 arranged oppositely, the supporting end 601 is rotatably connected to the mounting seat 20, and the output end 602 extends from the rotor 71 Extending out from one side of the stator assembly 10, that is, the mounting ear 21 of the mounting seat 20 of the outer rotor motor of this embodiment and the output section of the rotating shaft 60 are respectively located at the two ends of the motor axial direction, so that the motor can not only realize the axial arrangement interface connection with the external bracket but also realize the radial arrangement interface connection with the external bracket, which is more convenient to install and use.

[0084] In another embodiment of the present invention, see Figure 1 , Figure 2 and Fig.10 ,in, Fig.10 for Figure 1The schematic diagram of the structure of the terminal board of the outer rotor motor is shown.

[0085] In this embodiment, if Fig.10 As shown, the terminal block 30 is provided with a plurality of single-sided pads 35 and a plurality of double-sided pads 36, such as double-sided hole-shaped pads, etc., wherein the single-disc pads are respectively connected to the three-phase lines of the coil winding 13 and are not connected to each other, are connected to the neutral point of the coil winding 13 and are connected to each other, and the double-sided pads 36 are respectively connected to the single-sided pads 35. In this way, after the lead wires of the coil winding 13 are welded to the single-sided pads 35, the lead wires of the coil winding 13 and the power line 40 can be connected, and after the neutral wire of the coil winding 13 is welded to the single-sided welding pad, the neutral wire of the coil winding 13 can be connected, which has good operational feasibility in actual manufacturing.

[0086] Furthermore, in this embodiment, if Fig.10 As shown, the terminal block 30 is also provided with an open slot 34, which includes a first slot section 341 and a second slot section 342. The first slot section 341 is a notch extending a certain length radially along the side of the terminal block 30, and the second slot section 342 is connected to the tail of the first slot section 341 at an angle. Fig.10 As shown in the diagram, the opening groove 34 is formed along the side edge of the terminal block 30 and extends from the outside to the inside and then to the left. The single-sided pad 35 is correspondingly arranged on the left side of the opening groove 34. When wiring, the guiding effect of the opening groove 34 can be utilized to first pull the terminal block 30 radially inward from the outside, then pull it to the left, and then lead it out to the single-sided pad 35. On the one hand, the turning opening groove 34 has a certain orientation constraint effect on the winding lead wire, and on the other hand, it can realize the left-hand operation of winding and the right-hand operation of soldering, which is in line with the operating habits of most people and has strong operational feasibility.

[0087] In the outer rotor motor provided by the above-mentioned embodiments of the present invention, the power cord 40 will not shake due to external force during the operation of the motor, which can effectively prevent the connection between the power cord 40 and the terminal block 30 from loosening and poor electrical contact. The power cord 40 will not be repeatedly bent due to displacement, or broken due to repeated friction with the terminal block 30 or the cover plate 51, thereby effectively preventing the power cord 40 from being damaged, and the overall performance of the outer rotor motor can be further improved. In addition, the power cord 40 passes through the side of the mounting base 20 of the outer rotor motor, which will not increase the axial size of the motor, thereby meeting the miniaturization development needs of the outer rotor motor.

[0088] Another embodiment of the present invention further provides a fan, comprising the above-mentioned outer rotor motor.

[0089] The fan provided by the embodiment of the present invention uses the above-mentioned outer rotor motor, so that the production cost of the fan is reduced, and the electrical performance of the fan is more stable and reliable, the probability of electrical failure of the fan due to poor electrical contact of the outer rotor motor is reduced, the overall performance of the fan is improved, the maintenance frequency is reduced, and the user experience is improved. The fan also has other technical effects of the outer rotor motor provided by the above-mentioned embodiments, which will not be repeated here.

[0090] It can be understood that the fan of this embodiment is not only suitable for mobile air conditioners, but also for other types of air conditioning units such as window units, split units, etc. Of course, the fan of this embodiment is also suitable for other equipment such as exhaust equipment, air purification systems and cooling equipment.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An outer rotor motor, characterized in that: It includes a mounting base, a power cord, and a terminal block and an end cover assembly mounted on the mounting base, the end cover assembly includes a cover plate and a wire pressing plate, the cover plate is provided with a wire outlet groove, one end of the power cord is connected to the terminal block, and the other end of the power cord passes through the wire outlet groove, the slot size of the wire outlet groove is greater than or equal to the radial cross-sectional size of the power cord, and the wire pressing plate cooperates with the cover plate to clamp the power cord; the cover plate includes a cover plate portion, the cover plate portion is provided with an embedding opening, the embedding opening passes through the wire outlet groove, the wire pressing plate has a shielding portion and a pressing portion, the shielding portion covers the embedding opening, and the pressing portion cooperates with the wire outlet groove to clamp the power cord.

2. The outer rotor motor according to claim 1, characterized in that: The mounting seat includes a mounting ear and a mounting cylinder protruding from one side of the mounting ear, the cover plate and the wire pressing plate are respectively connected to the mounting ear, and along the radial direction of the mounting cylinder, the wire outlet groove is located on the side of the mounting ear and / or the mounting cylinder.

3. The outer rotor motor according to claim 2, characterized in that: The cover plate also includes a side plate portion connected to the cover plate portion, the cover plate portion is arranged to cover the mounting ear portion along the axial direction of the mounting cylinder portion, the side plate portion is arranged on the side of the mounting ear portion along the radial direction of the mounting cylinder portion, and the wire outlet groove is arranged on the side plate portion.

4. The outer rotor motor according to claim 3, characterized in that: The pressing portion is provided with a protrusion at a position corresponding to the wire outlet groove, and the protrusion extends into the wire outlet groove and abuts against the power line.

5. The outer rotor motor according to claim 4, characterized in that: The side plate portion is provided with a plurality of the wire outlet grooves along the circumferential direction, and the pressing portion is provided with the protrusions at positions corresponding to the wire outlet grooves.

6. The outer rotor motor according to claim 3, characterized in that: The side plate portion is also provided with an insertion port, and the wire pressing plate also has an insertion portion, and the wire pressing plate is plugged into the cover plate through the insertion portion and the insertion port.

7. The outer rotor motor according to claim 3, characterized in that: The mounting ear portion includes a first connecting ear, a second connecting ear and a third connecting ear arranged along the circumference of the mounting cylinder portion, the wire pressing plate is connected to the first connecting ear, the cover plate portion is connected to the third connecting ear, and the second connecting ear is exposed from the cover plate portion and is used for connection to an external structure.

8. The outer rotor motor according to claim 7, characterized in that: Along the axial direction of the mounting cylinder, the first connecting ear is concave relative to the second connecting ear, and the thickness of the wire pressing plate is equal to the concave depth.

9. The outer rotor motor according to any one of claims 3 to 8, characterized in that: There is a gap between the side plate portion and the side of the mounting ear portion, the wire outlet slot is connected to the gap, the wiring board is arranged on the side of the mounting ear portion away from the cover plate portion, and the power line is led out at a position of the wiring board facing the gap.

10. The outer rotor motor according to any one of claims 2 to 8, characterized in that: The outer rotor motor also includes a stator core, the outer peripheral wall of the end of the mounting cylinder connected to the mounting ear is provided with a boss, the terminal block is sleeved on the boss, the stator core is sleeved on the end of the mounting cylinder where the boss is not provided, the end surface of the stator core facing the mounting ear abuts against the boss and is spaced apart from the terminal block.

11. The outer rotor motor according to claim 10, characterized in that: The stator core is bonded to the mounting cylinder by adhesive, and the mounting cylinder is provided with a groove for accommodating excess adhesive.

12. The outer rotor motor according to claim 10, characterized in that: The wiring board is provided with a second sleeve hole for the boss to pass through, and a clamping positioning structure is provided between the hole wall of the second sleeve hole and the outer peripheral wall of the boss.

13. A fan, characterized in that: The invention comprises an outer rotor motor as described in any one of claims 1 to 12.

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